The investigators are studying the impact of the interventions of a multidisciplinary team (MDT) - consisting of a Coventry case manager, social worker, and medical director, alongside a Medco specialist pharmacist - on the hospitalization rates of high risk seniors with chronic conditions, compared with a usual care approach. The study will also examine the impact on quality of life, medication adherence, medical costs, hospital readmission rates, and a variety of other important measures. The outcome of COSS may support a means to further enhance and develop a comprehensive care model program by leveraging the partnership between a health plan and a pharmacy benefit manager.